AMERICAN MEGATRENDS, INC.

ENTERPRISE-II SERIES 16

Device Type             Mainboard
Processor               80486SX/80487SX/80486DX
Processor Speed         25/33/50MHz
Chip Set                Intel
Video Chip Set          None
Maximum Onboard Memory  96MB
Maximum Video Memory    None
Cache                   128KB
BIOS                    AMI
Dimensions              355mm x 304mm
I/O Options             External memory card, floppy drive interface, PS/2
                        mouse port
NPU Options             4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  AMI module connector        J5       Turbo switch                J18

  PS/2 mouse port             J6       Turbo LED                   J19

  Floppy drive interface      J8       Power connector             PS1

  AMI module connector        J9       Power connector             PS2

  Speaker                     J13      Power connector             PS3

  Power LED & keylock         J14      External memory card        SL1

  Reset switch                J17

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

  »   Floppy drive select XT/AT               J12           Pins 1 & 2
                                                              closed

      Floppy drive select PS/2                J12           Pins 2 & 3
                                                              closed

  »   Factory configured - do not alter       J22             Closed

  »   Factory configured - do not alter      SW1/1             Off

  »   Monitor type select monochrome         SW1/2             Off

      Monitor type select color              SW1/2              On

     SIMM CONFIGURATION (MAINBOARD)

     Size        Bank 0        Bank 1

     4MB        (4) 1M x 9      None

     8MB        (4) 1M x 9   (4) 1M x 9

     16MB       (4) 4M x 9      None

     32MB       (4) 4M x 9   (4) 4M x 9

                 SIMM CONFIGURATION (EXTERNAL MEMORY CARD)

     Size          Bank 2        Bank 3         Bank 4         Bank 5

     4MB         (4) 1M x 9       None           None           None

     8MB         (4) 1M x 9    (4) 1M x 9        None           None

     8MB         (4) 1M x 9       None        (4) 1M x 9        None

     16MB        (4) 4M x 9       None           None           None

     16MB        (4) 1M x 9    (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     32MB        (4) 4M x 9    (4) 4M x 9        None           None

     32MB        (4) 4M x 9       None        (4) 4M x 9        None

     64MB        (4) 4M x 9    (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

  Note: To install maximum memory of 96MB, fully populate mainboard with
  32MB & install memory card with 64MB installed.

     CACHE CONFIGURATION

     Size          Bank 0

     128KB      (4) 32K x 8

                            CPU SPEED SELECTION

      Speed              J2                J27                 J35

      25MHz           Pins 1 & 2        Pins 1 & 2      Pins 2 & 3 closed
                       closed             closed

      33MHz           Pins 1 & 2           Open         Pins 2 & 3 closed
                       closed

      50MHz           Pins 1 & 2        Pins 1 & 2      Pins 1 & 2 closed
                       closed             closed

  Note: If CPU is revision, B6 or earlier, leave J2 open.

                            CPU TYPE SELECTION

          Type                     J36                      J37

         80486SX            Pins 2 & 3 closed               Open

         80487SX             Pins 1 & 2, 3 & 4       Pins 2 & 3 closed
                                  closed

         80486DX             Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed

           P24               Pins 1 & 2, 3 & 4       Pins 1 & 2 closed
                                  closed